[Libguestfs] [PATCH v2] Daemon: fix handling of errors from xread and xwrite.

On Thu, Sep 17, 2009 at 03:33:24PM +0100, Richard W.M. Jones wrote: > > This caused me to waste about 3 hours looking for a non-existent "data > corrupter" bug, which turned out to be the result of not checking the > return value of xread ... You might want to add __attribute__((__warn_unused_result__)) to the header file decl of xread/xwrite so that the compiler will warn if any other code areas forget to check the return error code